This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 19 |
| 4 | 13 |
| 5 | 211 |
| 6 | 95 |
| 7 | 2059 |
| 8 | 1261 |
| 9 | 19171 |
| 10 | 5275 |
| 11 | 7613 |
| 12 | 1159 |
| 13 | 1586131 |
| 14 | 4766585 |
| 15 | 14316139 |
| 16 | 505661 |
| 17 | 129009091 |
| 18 | 2910965 |
| 19 | 1161737179 |
| 20 | 12675403 |
| 21 | 10458256051 |
| 22 | 1364211535 |
| 23 | 2002867877 |
| 24 | 620687383 |
| 25 | 847255055011 |
| 26 | 2541798719465 |
| 27 | 7625463267259 |
| 28 | 157769131169 |
| 29 | 68629840493971 |
| 30 | 86254737475 |